यदि \(A={x\in\mathbb{R}: x<0}\), \(B={x\in\mathbb{R}: x^2\le4}\), तो \(A\cup B\) क्या है?
If \(A={x\in\mathbb{R}: x<0}\), \(B={x\in\mathbb{R}: x^2\le4}\), what is \(A\cup B\)?
Explanation opens after your attempt
Correct Answer
A. (\(-\infty,2]\)
Concept
(B=[-2,2]), and (A) gives all negative numbers. Together they form (\(-\infty,2]\).
Why this answer is correct
The correct answer is A. (\(-\infty,2]\). (B=[-2,2]), and (A) gives all negative numbers. Together they form (\(-\infty,2]\).
Exam Tip
(B=[-2,2]) और (A) सभी ऋणात्मक संख्याएं देता है। मिलाकर (\(-\infty,2]\) मिलता है।
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